Paint cans, aerosols, walls and canvas, by daylight or the secrecy of night -- these are just some of the tools and times by which street artists ply their craft. While tagging can be nothing more than a bit of scrawl on a brick or cement facade, when it's in the hands of one of the incredibly gifted artists on this list, creativity, vision and profound artistic, and political statements abound. Let’s take a break from our everyday routine for a moment here and reflect on five unconventional graffiti artists rocking the planet right now.